Good news! It appears that the 750 will support a 32 mbyte card! I just
received a 16 mbyte card from Kingston. Inside the box is a letter and parts
list which includes a 32 mbyte part:
Kingston P/N IBM P/N Description
KTM-750/32 A1987A 32MB Memory Upgrade Module
The letter specifically says that the memory is for the 750/750C and that
system memory can be expanded to a max of 36MB.