As is written in the following Note it is possible to use SAP_UI7.50 with NetWeaver 740.
2227501 - SAP_UI 7.50 minimal installation requirements
What you may need to do is to update the SAP_UI version with t-code SAINT or SUM(software Update Manager).
SAP_UI 750 SP1 contains UI5 1.32 version.
Regards,
Makoto