Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_544 ( "Rank (CSA)" text, "Combined Statistical Area (or Metropolitan Statistical Area if noted)" text, "State(s)" text, "2007 Estimate" text, "2000 Population" text, "Percent Change (1990\u20132000)" text )

### Question ###
What is the 2007 estimate when the rank (csa) is 4

### Accurate SQL ###

SELECT "2007 Estimate" FROM table_544 WHERE "Rank (CSA)" = '4'