Possibly interesting KK ULT 200k gaur

[Crispy]

Hand has kinda been rolling in my mind a lil. Blinds are 300/600 and there are 180ppl remaining 90 get paid. Ive been playing a pretty aggressive game, raising at least one or twice an orbit.
Hand:
KK UTG I make it 1800 folds to to Button who calls.

Flop: QQ2 rainbow. Pot(4600 ish) I check. Villan bets 3200, I call.

Turn 5. I check, Villan bets 7200 Hero? I was trying to get worse hands involved in the hand with me but with this turn bet how often is this a bluff? Thanks for any advice.