Let's take this back to the very beginning of God creating male and female as much of the Bible is written as being masculine language.
Gen 1:26 And God said, Let us make man in our image, after our likeness: and let them have dominion over the fish of the sea, and over the fowl of the air, and over the cattle, and over all the earth, and over every creeping thing that creepeth upon the earth.
Gen 1:27 So God created man in his own image, in the image of God created he him; male and female created he them.
Notice in vs. 27 in the use of the word "him" as referring to both male and female. We also read this again in Genesis 5:1-2 Male and female created he them; and blessed them, and called their name Adam, in the day when they were created. God created Adam, a name that refers to mankind or humanity in Hebrew, in two genders as male and female. The singular masculine is used to refer collectively to both male and female genders.
Throughout the Bible we see such verses like 1 Timothy 3:1-2 as being masculine language as we read "husband of one wife". This phrase is gender inclusive rather than gender exclusive because the masculine language is often used to incorporate women in scripture just like Genesis 1:26-27 and 5:1-2. It's the same with using the word "brethren" as it refers to both male and female from the first page of scripture to the last page of scripture.
There is an even stronger connection between the masculine singular and gender inclusivity in 1Timothy 3:1 -16 and Titus 1:5-16. Regarding the office of Pastor means that women are not prohibited from serving as Pastor if God calls them. The Holy Spirit gives the gifts He pleases as we read in 1 Corinthians 12 meaning that no woman is barred from any Spiritual gift or office because of her gender. Nowhere in scripture does it say women can not be Pastors or Evangelist.