You can generate this frequency with either part using "exact frequency" mode.
With 10MHz reference your integer boundary is 3580MHz and desired output frequency is 10750/3 MHz=(10740+10)/3=3580MHz +10/3 MHz.
Exact frequency mode splits the frequencies between integer boundaries into equally spaced channels. If we set the number of channels to 3 (Reg0C=3) we get two equally spaced channels appearing at 1/3 and 2/3's spacing between the two integer boundaries.
Pick the first channel to get exactly 3580MHz+10/3 MHz output frequency. You pick this channel by setting the fractional-n frequency registers to just over the desired channel frequency.
10(Nint+Nfrac)=3580+10/3
Nint+Nfrac=358 +1/3
Reg03=Nint=358d=0x166
Reg04=(1/3)*2E24=5592405.333
Now round up to set the fractional-n value just over the exact frequency channel:
Reg04=5592406d=0x555556
If you turn exact frequency mode off (Reg0C=0) the output frequency will be off by a little bit -- instead of 3583.333...MHz you will get 3583.333333730697MHz.