Ebo,
Take a look in the Hardware Universe.
https://hwu.netapp.com/Controller/Index?platformTypeId=2032
Select your ONTAP version and FAS2750.
In the results, click on "Onboard ports and cables".
In the resulting pop-up window, make sure you choose the FAS2750 UTA2/CNA configuration.
Then click on any of e0c -> e0f ports to see your cabling options.
For your situation, the 1GBASE-T SFP transceiver X6568-R6 might be your solution.