According to the compatibility list, D750 is not compatible. I use it as a master flash for the D7000 as well as the D810, although the latter is not explicitly stated either (only the D800). Works fine though and the battery lasts and lasts. However, it seems as if other tolerances were used for the flash hot shoe on the D750, so that many flash units cannot be attached precisely, i.e. no clean contact can be made with the pins. Therefore, it is probably not advisable....