https://www.youtube.com/watch?v=rMXD5DxbXog&list=UUkH3CcMfqww9RsZvPRPkAJA&spfreload=10
At 1:35, Link is riding Epona and you can hear his voice shouting "Ha" to make Epona goes faster. It's a deep and clearly masculine voice.
Please now end this pseudo speculations that Link could be a female. It will never happen, Link can't be a female character and Nintendo will never do it.