AK on bubble

[SengioKang]

I was playing a freeroll for a satellite into the $1000 freeroll on UB the other day and was wondering about this for a couple days now. I think I played it right, but i'll welcome suggestions. i'm just looking how to play this vs the stacks that I encountered.

everyone folds to me and i pick up AhKh in the HJ.
i've been playing super tight (and not getting hands) and had 4 stacks behind me that had me covered by 10:1 which is one reason i was waiting for something premium to push... i knew i would get action, especially from the CO who was in every pot at that point. 47 to go i'm in 40th and 30 pay entry.

blinds were 12/2400 and i had 29k.

is this a push or a small raise to get money in the pot and then push the flop?