Although we've never frozen any, this is what the Dole Pineapple site offers:
Can I freeze DOLE Fresh Pineapple?
We do not recommend freezing fresh pineapple because it tends to lose some of its flavor. If you must freeze the pineapple for storage purposes, it can be cut and stored in an airtight plastic bag or container in its juice or syrup for up to 3 months.
If I were going to try it, I'd add a little of the syrup from a can of pineapple to help maintain some flavor as the above site suggests...