Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What is the highest BR number with a SECR number of 765?

### Inputs:
table_name: table, columns: ['SECR No.', 'SR No.', 'BR No.', 'Builder', 'Date Delivered', 'Date Withdrawn']

### Response:
SELECT MAX BR No. FROM table WHERE SECR No. = 765