I think it's difficult to tell with albinos, but males will often have a 'beard' of dark spots under their chins. I can't really tell from the pics, but yours doesn't look like it has a lot of spots on its neck....
The only sure way to tell if your frog calls or not. Males are the only ones that call, and they start fairly young (mine's about that size, and he's just started chirping at me sometimes). If I had to guess I'd say yours is a female, but there's no way to be sure just based on pics.

Very nice looking frog btw