[BigAlK]

It's early so I'm guessing you've got no significant reads. Pot is somewhere just shy of 500. Assuming an extremely tight range for CO of AK, QQ+ you need just shy of 40% equity to justify continuing in the hand so folding is wrong. If you flat call it's almost 1/3 of your stack and it will be hard to do anything except check/fold on a flop that isn't ace or king high (except a flopped straight). Any raise is committing you so I would just shove my stack in now. This maximizes fold equity (getting both villians to fold isn't a bad result here). The most likely result is MP smooth caller goes away and CO calls. Even with the tight range listed above you've got the odds you need. If villians range includes anything else (a sqeeze with air, lower pairs, smaller Ax hands, or KQ) then your equity gets even better.