Hi Leandro,
You can follow below thread for SP14 notes. I see the library version would be around 1.28.23. But this link should be helpful. For this you need to upgrade SAP_UI component from SP12 to Sp14 incrementally.SAP Fiori - UI Add-on SP14 notes list, SAPUI5 library 1.28.23
I see that you want to upgrade to 750. Backend should be 7.5 (recommended)
as per : 2227501
Reason and Prerequisites
Applicable for SAP NetWeaver 7.40 & 7.50 ABAP backends.
Regards,
Tejas