Lincoln air compressor question

[RESCUE-K9]

I have a Lincoln air compressor that was the right price (free) it says 7.5 horse 21cfm 80 gallon upright .... all good stuff now the problem its a 3 phase motor and I can't get 3 phase in a residential area. My question is I have a 5 horse 2 phase that spins at 2500 rpm the original spins at 900 rpm would this burn up the head ? Would a be ok going a different pulley arrangement suffice or am I on the wrong path here?

Thanks for you time