question about AKo midway through

[rcfactor]

its midway through a 22 dollar tourny on party. im big stack at table with around 5000. blinds are 50-100. next largest is around 3000.
I receive AKo in utg+1 and raise to about 600. folded around to next largest stack, who reraises 1000. what do i do here? call the raise and hope i hit, but then if i don't muck, or fold, or reraise all in. thanks for any help.