5+0.5 5k gura AK after 3bet, shove, call or fold

[Myg]

PokerStars No-Limit Hold'em Tourney, Big Blind is t300 (8 handed) internettexasholdem.com

BB (t16540)
UTG (t8860)
UTG+1 (t8610)
MP1 (t18605)
MP2 (t6245)
Hero (t6960)
Button (t7200)
SB (t2590)

Preflop: Hero is CO with A[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/club.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">UTG+1 raises to t900</font>, MP1 calls t900, <font color="#CC3333">MP2 raises to t3000</font>, <font color="#CC3333">, Hero ???????

UTG+1 range is somewhere AT, 88+,

MP1 is a fish who is in love with medium pocket pairs, have called few pf allin with 77 eg.

MP2 no info, guessing 3bet range of AK(AQs)and TT+

Fold, because I haven't invested anything and not exact information on 3better

or

Shoving, getting good odds cause MP1 can call too with small PP