If he only has AA here then it's a fold, however add in any other hand in his range then it's a clear call - even with AA being a big part of his range. Just a note - I've seen people squeeze like this with all types of hands and while I wouldn't be surprised to see AA here obv, I wouldn't be surprised to see AK or QQ either (and random bluffs vs some villains).
The pot is $6.17 and we have to call $4.15 so we need 40% equity to call. Against {AA,AK} vs {KK} we have 47% equity so against this range, it's a clear call. If he does this with any more hands in his range, you should snap call at a cat-like speed.
