Congrats on finally getting your hands on him/her! Glad s/he's going to be well taken care of now.And I agree, he looks a bit more like a "she". I've noticed over the past couple of years that female's heads tend to be a bit rounder and shorter. "He" looks just like my big normal female (also about 1800g). Definitely get that double checked.
(Unless of course sex doesn't matter in this case. lol.)
Either way, congrats on him!