NL400 KK preflop against 4 bet

[Eternal]

Villain is 14/8, He seems like a tag player. After I raised to 200, he shoved it in without hesitation. Is this a snap call? [img]/images/graemlins/smile.gif[/img]

Full Tilt Poker - No Limit Hold'em Cash Game - $2/$4 Blinds - 8 Players - (LegoPoker Hand History Converter)

SB: $382.80
BB: $446.75
UTG: $900.50
UTG+1: $505.10
Hero (MP1): $520.00
MP2: $714.95
CO: $332.00
BTN: $159.20

Preflop: Hero is dealt K[img]/images/graemlins/diamond.gif[/img] K[img]/images/graemlins/heart.gif[/img] (8 Players)
UTG calls $4.00, UTG+1 folds, <font color="red">Hero raises to $18.00</font>, 5 folds, <font color="red">UTG raises to $90.00</font>, <font color="red">Hero raises to $200.00</font>, <font color="red">UTG raises all-in to $900.50</font>, [i]Hero ?

I have $320 left. What to do..