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

### Instruction:
If the 2011 population is 3685681, what is the name of the headquarters?

### Inputs:
table_name: table, columns: ['District', 'Headquarters', 'Area (km²)', 'Population (2011)', 'Division']

### Response:
SELECT Headquarters FROM table WHERE Population (2011) = 3685681