how to get a high pitched singing voice for male?

i like listening to female opera, and it always makes me want to be able to sing it, i can do good in the lower section from D2 to F3, and the highest note i can produce comfortably(not screaming) is A4. but when i sing in my higher voice, it really sounds like a male trying to squeeze out the higher notes , and not a person singing high notes, so;
is there ways to improve my voice so that i can sing comfortably for the trebles?